Add Android test case for -Wpartial-availability. Also update Android availability tests to match on the whole string, so we can distinguish between "Android 16" and "Android 16.0.0" at the end of warning messages.

[srhines]

Thanks for the expanded (and more specific) tests.

clang/test/Sema/attr-availability-android.c

 // RUN: %clang_cc1 "-triple" "arm-linux-androideabi16" -fsyntax-only -verify %s
+// RUN: %clang_cc1 -D WARN_PARTIAL -Wpartial-availability "-triple" "arm-linux-androideabi16" -fsyntax-only -verify %s
 
 void f0(int) __attribute__((availability(android,introduced=14,deprecated=19)));
 void f1(int) __attribute__((availability(android,introduced=16)));
 void f2(int) __attribute__((availability(android,introduced=14,deprecated=16))); // expected-note {{'f2' has been explicitly marked deprecated here}}
+#ifdef WARN_PARTIAL
+// expected-note-re@+2 {{'f3' has been marked as being introduced in Android 19 here, but the deployment target is Android 16.0.0{{$}}}}
+#endif
 void f3(int) __attribute__((availability(android,introduced=19)));
 void f4(int) __attribute__((availability(android,introduced=9,deprecated=11,obsoleted=16), availability(ios,introduced=2.0,deprecated=3.0))); // expected-note{{explicitly marked unavailable}}
 void f5(int) __attribute__((availability(ios,introduced=3.2), availability(android,unavailable))); // expected-note{{'f5' has been explicitly marked unavailable here}}
 
 void test() {
   f0(0);
   f1(0);
-  f2(0); // expected-warning{{'f2' is deprecated: first deprecated in Android 16}}
+  f2(0); // expected-warning-re{{'f2' is deprecated: first deprecated in Android 16{{$}}}}
+#ifdef WARN_PARTIAL
+// expected-warning@+2{{'f3' is only available on Android 19 or newer}} expected-note@+2{{enclose 'f3' in a __builtin_available check to silence this warning}}
+#endif
   f3(0);
-  f4(0); // expected-error{{f4' is unavailable: obsoleted in Android 16}}
+  f4(0); // expected-error-re{{'f4' is unavailable: obsoleted in Android 16{{$}}}}
   f5(0); // expected-error{{'f5' is unavailable: not available on Android}}
 }
 
 // rdar://10535640
 
 enum {
     foo __attribute__((availability(android,introduced=8.0,deprecated=9.0)))
 };
 
 enum {
     bar __attribute__((availability(android,introduced=8.0,deprecated=9.0))) = foo
 };
 
 enum __attribute__((availability(android,introduced=8.0,deprecated=9.0))) {
     bar1 = foo
 };