Guard resource access header with __OBJC__ to exclude Foundation.h (#7962)

Guard resource access header with `__OBJC__` to avoid including `Foundation.h` in languages that do not support it, i.e. non-objc/c++

Add check the file extension for assembly files to not include `Foundation.h` there as well.

Fixes: #7949

Author: rjmansfield

Fixtures/Resources/Simple/Sources/MixedClangResource/baz.S

@@ -253,7 +253,8 @@ public final class ClangModuleBuildDescription {
     /// default value (possibly based on the filename suffix).
     public func basicArguments(
         isCXX isCXXOverride: Bool? = .none,
-        isC: Bool = false
+        isC: Bool = false,
+        isAsm: Bool = false
     ) throws -> [String] {
         // For now fall back on the hold semantics if the C++ nature isn't specified. This is temporary until clients
         // have been updated.
@@ -307,7 +308,7 @@ public final class ClangModuleBuildDescription {
         // Include the path to the resource header unless the arguments are
         // being evaluated for a C file. A C file cannot depend on the resource
         // accessor header due to it exporting a Foundation type (`NSBundle`).
-        if let resourceAccessorHeaderFile, !isC {
+        if let resourceAccessorHeaderFile, !isC && !isAsm {
             args += ["-include", resourceAccessorHeaderFile.pathString]
         }
 
@@ -387,8 +388,9 @@ public final class ClangModuleBuildDescription {
 
         let isCXX = path.source.extension.map { SupportedLanguageExtension.cppExtensions.contains($0) } ?? false
         let isC = path.source.extension.map { $0 == SupportedLanguageExtension.c.rawValue } ?? false
+        let isAsm = path.source.extension.map { SupportedLanguageExtension.assemblyExtensions.contains($0) } ?? false
 
-        var args = try basicArguments(isCXX: isCXX, isC: isC)
+        var args = try basicArguments(isCXX: isCXX, isC: isC, isAsm: isAsm)
 
         args += ["-MD", "-MT", "dependencies", "-MF", path.deps.pathString]
 
@@ -512,6 +514,7 @@ public final class ClangModuleBuildDescription {
 
         let headerContent =
             """
+            #if __OBJC__
             #import <Foundation/Foundation.h>
 
             #if __cplusplus
@@ -525,6 +528,7 @@ public final class ClangModuleBuildDescription {
             #if __cplusplus
             }
             #endif
+            #endif
             """
 
         let headerFile = derivedSources.root.appending("resource_bundle_accessor.h")
@@ -549,4 +553,4 @@ extension ClangModuleBuildDescription {
     ) -> [ModuleBuildDescription.Dependency] {
         ModuleBuildDescription.clang(self).recursiveDependencies(using: plan)
     }
-}
+}