[libunwind] undef NDEBUG for assert.h in tests.

This makes sure the assertions also get verified in optimized builds.
This matches what is already done in bad_unwind_info.pass.cpp.

Reviewed By: #libunwind, MaskRay

Differential Revision: https://reviews.llvm.org/D131210

libunwind/test/forceunwind.pass.cpp

@@ -15,6 +15,7 @@
 // Basic test for _Unwind_ForcedUnwind.
 // See libcxxabi/test/forced_unwind* tests too.
 
+#undef NDEBUG
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>

libunwind/test/libunwind_02.pass.cpp

@@ -10,6 +10,7 @@
 // TODO: Figure out why this fails with Memory Sanitizer.
 // XFAIL: msan
 
+#undef NDEBUG
 #include <assert.h>
 #include <stdlib.h>
 #include <unwind.h>

libunwind/test/signal_frame.pass.cpp

@@ -21,6 +21,7 @@
 // are necessary to run this test.
 // UNSUPPORTED: target=powerpc{{(64)?}}-ibm-aix
 
+#undef NDEBUG
 #include <assert.h>
 #include <stdlib.h>
 #include <libunwind.h>

libunwind/test/signal_unwind.pass.cpp

@@ -13,6 +13,7 @@
 // TODO: Figure out why this fails with Memory Sanitizer.
 // XFAIL: msan
 
+#undef NDEBUG
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>

libunwind/test/unw_getcontext.pass.cpp

@@ -7,6 +7,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+#undef NDEBUG
 #include <assert.h>
 #include <libunwind.h>
 

libunwind/test/unwind_leaffunction.pass.cpp

@@ -13,6 +13,7 @@
 // TODO: Figure out why this fails with Memory Sanitizer.
 // XFAIL: msan
 
+#undef NDEBUG
 #include <assert.h>
 #include <dlfcn.h>
 #include <signal.h>