[libc++abi] Don't use a .sh.cpp test for uncaught_exception

Otherwise, we don't seem to get the DYLD_LIBRARY_PATH set up correctly
and the tests are run against the system libc++abi dylib.

llvm-svn: 358937

libcxxabi/test/uncaught_exception.pass.cpp

@@ -10,12 +10,6 @@
 
 // This tests that libc++abi still provides __cxa_uncaught_exception() for
 // ABI compatibility, even though the Standard doesn't require it to.
-//
-// We need to explicitly link against libc++abi, because libc++ does not
-// re-export this symbol.
-
-// RUN: %build -lc++abi -o %t.exe
-// RUN: %t.exe
 
 #include <cxxabi.h>
 #include <cassert>