Remove mangling tests from exclusion list

Those tests are now passing.

gcc/testsuite/ChangeLog:

	* rust/compile/nr2/exclude: Remove two mangling tests from exclusion
	file.

Signed-off-by: Pierre-Emmanuel Patry <[email protected]>

Author: P-E-P

gcc/testsuite/rust/compile/nr2/exclude

@@ -32,8 +32,6 @@ sizeof-stray-infer-var-bug.rs
 struct-expr-parse.rs
 undeclared_label.rs
 use_1.rs
-v0-mangle1.rs
-v0-mangle2.rs
 while_break_expr.rs
 issue-3139-2.rs
 issue-2953-2.rs