[PATCH, Darwin, testsuite] Adjust two tests for modern OS versions.

[Iain Sandoe]

Newer OS versions (10.14+) do not provide some of the CRTs that are used for
older ones (e.g. 10.5), and thus link tests that specify targeting such a 
revision fail.

For the two tests affected, we retain the testing of the correct defined OS 
version
number but switch to compile-only testing.  A link test will be added as part 
of a
follow-up.

tested on  x86_64-darwin16, 18, powerpc-darwin9, i686-darwin9.
applied to mainline
thanks
Iain

gcc/testsuite/
2019-06-13  Iain Sandoe  <i...@sandoe.co.uk>

        * gcc.dg/darwin-minversion-1.c: Use compile rather than link/run.
        * gcc.dg/darwin-minversion-2.c: Likewise.

diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-1.c 
b/gcc/testsuite/gcc.dg/darwin-minversion-1.c
index ee6493a..5f8524f 100644
--- a/gcc/testsuite/gcc.dg/darwin-minversion-1.c
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-1.c
@@ -1,6 +1,6 @@
 /* Basic test for -mmacosx-version-min switch on Darwin.  */
 /* { dg-options "-mmacosx-version-min=10.5" } */
-/* { dg-do run { target *-*-darwin* } } */
+/* { dg-do compile { target *-*-darwin* } } */
 
 int
 main ()
diff --git a/gcc/testsuite/gcc.dg/darwin-minversion-2.c 
b/gcc/testsuite/gcc.dg/darwin-minversion-2.c
index 46fab67..3dbbca6 100644
--- a/gcc/testsuite/gcc.dg/darwin-minversion-2.c
+++ b/gcc/testsuite/gcc.dg/darwin-minversion-2.c
@@ -1,6 +1,6 @@
 /* Basic test for -mmacosx-version-min switch on Darwin.  */
 /* { dg-options "-mmacosx-version-min=10.1 -mmacosx-version-min=10.5" } */
-/* { dg-do run { target *-*-darwin* } } */
+/* { dg-do compile { target *-*-darwin* } } */
 
 int
 main ()