[flang] Fix fveclib on Darwin (#77605)

Fixes fveclib.f90 and fveclib-codegen.f90 tests, that were failing
on Darwin.

Author: luporl

clang/lib/Driver/ToolChains/Flang.cpp

@@ -403,12 +403,10 @@ void Flang::addTargetOptions(const ArgList &Args,
         if (A->getValue() == StringRef{"Accelerate"}) {
           CmdArgs.push_back("-framework");
           CmdArgs.push_back("Accelerate");
-          A->render(Args, CmdArgs);
         }
       }
-    } else {
-      A->render(Args, CmdArgs);
     }
+    A->render(Args, CmdArgs);
   }
 
   if (Triple.isKnownWindowsMSVCEnvironment()) {

flang/test/Driver/fveclib.f90

@@ -5,6 +5,7 @@
 ! RUN: %flang -### -c -fveclib=Darwin_libsystem_m %s 2>&1 | FileCheck -check-prefix CHECK-DARWIN_LIBSYSTEM_M %s
 ! RUN: %flang -### -c --target=aarch64-none-none -fveclib=SLEEF %s 2>&1 | FileCheck -check-prefix CHECK-SLEEF %s
 ! RUN: %flang -### -c --target=aarch64-none-none -fveclib=ArmPL %s 2>&1 | FileCheck -check-prefix CHECK-ARMPL %s
+! RUN: %flang -### -c --target=aarch64-apple-darwin -fveclib=none %s 2>&1 | FileCheck -check-prefix CHECK-NOLIB-DARWIN %s
 ! RUN: not %flang -c -fveclib=something %s 2>&1 | FileCheck -check-prefix CHECK-INVALID %s
 
 ! CHECK-NOLIB: "-fveclib=none"
@@ -14,6 +15,7 @@
 ! CHECK-DARWIN_LIBSYSTEM_M: "-fveclib=Darwin_libsystem_m"
 ! CHECK-SLEEF: "-fveclib=SLEEF"
 ! CHECK-ARMPL: "-fveclib=ArmPL"
+! CHECK-NOLIB-DARWIN: "-fveclib=none"
 
 ! CHECK-INVALID: error: invalid value 'something' in '-fveclib=something'