test: add missing skips for native add-on tests

---
type: pre_commit_static_analysis_report
description: Results of running static analysis checks when committing changes.
report:
  - task: lint_filenames
    status: passed
  - task: lint_editorconfig
    status: passed
  - task: lint_markdown
    status: na
  - task: lint_package_json
    status: na
  - task: lint_repl_help
    status: na
  - task: lint_javascript_src
    status: na
  - task: lint_javascript_cli
    status: na
  - task: lint_javascript_examples
    status: na
  - task: lint_javascript_tests
    status: passed
  - task: lint_javascript_benchmarks
    status: na
  - task: lint_python
    status: na
  - task: lint_r
    status: na
  - task: lint_c_src
    status: na
  - task: lint_c_examples
    status: na
  - task: lint_c_benchmarks
    status: na
  - task: lint_c_tests_fixtures
    status: na
  - task: lint_shell
    status: na
  - task: lint_typescript_declarations
    status: na
  - task: lint_typescript_tests
    status: na
  - task: lint_license_headers
    status: passed
---

Author: Planeshifter

lib/node_modules/@stdlib/stats/base/dists/normal/logpdf/test/test.native.js

@@ -38,17 +38,20 @@ var data = require( './fixtures/r/data.json' );
 // VARIABLES //
 
 var logpdf = tryRequire( resolve( __dirname, './../lib/native.js' ) );
+var opts = {
+	'skip': ( logpdf instanceof Error )
+};
 
 
 // TESTS //
 
-tape( 'main export is a function', function test( t ) {
+tape( 'main export is a function', opts, function test( t ) {
 	t.ok( true, __filename );
 	t.strictEqual( typeof logpdf, 'function', 'main export is a function' );
 	t.end();
 });
 
-tape( 'if provided `NaN` for any parameter, the function returns `NaN`', function test( t ) {
+tape( 'if provided `NaN` for any parameter, the function returns `NaN`', opts, function test( t ) {
 	var y;
 
 	y = logpdf( NaN, 0.0, 1.0 );
@@ -75,19 +78,19 @@ tape( 'if provided `NaN` for any parameter, the function returns `NaN`', functio
 	t.end();
 });
 
-tape( 'if provided `Infinity` for `x` and a finite `mu` and `sigma`, the function returns `-Infinity`', function test( t ) {
+tape( 'if provided `Infinity` for `x` and a finite `mu` and `sigma`, the function returns `-Infinity`', opts, function test( t ) {
 	var y = logpdf( PINF, 0.0, 1.0 );
 	t.equal( y, NINF, 'returns -Infinity' );
 	t.end();
 });
 
-tape( 'if provided `-Infinity` for `x` and a finite `mu` and `sigma`, the function returns `-Infinity`', function test( t ) {
+tape( 'if provided `-Infinity` for `x` and a finite `mu` and `sigma`, the function returns `-Infinity`', opts, function test( t ) {
 	var y = logpdf( NINF, 0.0, 1.0 );
 	t.equal( y, NINF, 'returns -Infinity' );
 	t.end();
 });
 
-tape( 'if provided a negative `sigma`, the function always returns `NaN`', function test( t ) {
+tape( 'if provided a negative `sigma`, the function always returns `NaN`', opts, function test( t ) {
 	var y;
 
 	y = logpdf( 2.0, 0.0, -1.0 );
@@ -111,7 +114,7 @@ tape( 'if provided a negative `sigma`, the function always returns `NaN`', funct
 	t.end();
 });
 
-tape( 'if provided `sigma` equals `0`, the function evaluates a degenerate distribution centered at `mu`', function test( t ) {
+tape( 'if provided `sigma` equals `0`, the function evaluates a degenerate distribution centered at `mu`', opts, function test( t ) {
 	var y;
 
 	y = logpdf( 2.0, 2.0, 0.0 );
@@ -132,7 +135,7 @@ tape( 'if provided `sigma` equals `0`, the function evaluates a degenerate distr
 	t.end();
 });
 
-tape( 'the function evaluates the logpdf for `x` given parameters `mu` and `sigma`', function test( t ) {
+tape( 'the function evaluates the logpdf for `x` given parameters `mu` and `sigma`', opts, function test( t ) {
 	var expected;
 	var delta;
 	var sigma;