revert back fix for implicit exports of imports

Author: vladima

src/compiler/binder.ts

@@ -355,7 +355,7 @@ namespace ts {
         function declareModuleMember(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags): Symbol {
             const hasExportModifier = getCombinedNodeFlags(node) & NodeFlags.Export;
             if (symbolFlags & SymbolFlags.Alias) {
-                if (node.kind === SyntaxKind.ExportSpecifier || (node.kind === SyntaxKind.ImportEqualsDeclaration && (hasExportModifier || container.flags & NodeFlags.ExportContext))) {
+                if (node.kind === SyntaxKind.ExportSpecifier || (node.kind === SyntaxKind.ImportEqualsDeclaration && hasExportModifier)) {
                     return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
                 }
                 else {

tests/baselines/reference/newNamesInGlobalAugmentations1.js

@@ -13,7 +13,7 @@ declare global {
     }
     class Cls {x}
     let [a, b]: number[];
-    import X = M.M1.x;
+    export import X = M.M1.x;
 }
 
 //// [main.ts]

tests/baselines/reference/newNamesInGlobalAugmentations1.symbols

@@ -26,7 +26,7 @@ declare global {
 >a : Symbol(a, Decl(f1.d.ts, 11, 9))
 >b : Symbol(b, Decl(f1.d.ts, 11, 11))
 
-    import X = M.M1.x;
+    export import X = M.M1.x;
 >X : Symbol(X, Decl(f1.d.ts, 11, 25))
 >M : Symbol(M, Decl(f1.d.ts, 1, 10))
 >M1 : Symbol(M.M1, Decl(f1.d.ts, 3, 17))

tests/baselines/reference/newNamesInGlobalAugmentations1.types

@@ -26,7 +26,7 @@ declare global {
 >a : number
 >b : number
 
-    import X = M.M1.x;
+    export import X = M.M1.x;
 >X : number
 >M : typeof M
 >M1 : typeof M.M1

tests/cases/compiler/newNamesInGlobalAugmentations1.ts

@@ -12,7 +12,7 @@ declare global {
     }
     class Cls {x}
     let [a, b]: number[];
-    import X = M.M1.x;
+    export import X = M.M1.x;
 }
 
 // @filename: main.ts