Fix unwinding_through_signal_frame test.

I accidentally removed the compilcation of the test implementation file
with special flags needed for the test to work. This change creates the
impl as a library with those flags back.

Bug: 14819262
Change-Id: Ib84fd26a7f4d40a0267d3ed686185b0abc5a3706

tests/Android.mk

@@ -86,7 +86,6 @@ libBionicStandardTests_src_files := \
     signal_test.cpp \
     stack_protector_test.cpp \
     stack_unwinding_test.cpp \
-    stack_unwinding_test_impl.c \
     stdatomic_test.cpp \
     stdint_test.cpp \
     stdio_test.cpp \
@@ -121,6 +120,9 @@ libBionicStandardTests_cppflags := \
 libBionicStandardTests_ldlibs_host := \
     -lrt \
 
+libBionicStandardTests_whole_static_libraries := \
+    libBionicUnwindTest \
+
 module := libBionicStandardTests
 module_tag := optional
 build_type := target
@@ -129,6 +131,25 @@ include $(LOCAL_PATH)/Android.build.mk
 build_type := host
 include $(LOCAL_PATH)/Android.build.mk
 
+# -----------------------------------------------------------------------------
+# Special stack unwinding test library compiled with special flags.
+# -----------------------------------------------------------------------------
+libBionicUnwindTest_cflags := \
+    $(test_cflags) \
+    -fexceptions \
+    -fnon-call-exceptions \
+
+libBionicUnwindTest_src_files := \
+    stack_unwinding_test_impl.c \
+
+module := libBionicUnwindTest
+module_tag := optional
+build_type := target
+build_target := STATIC_TEST_LIBRARY
+include $(LOCAL_PATH)/Android.build.mk
+build_type := host
+include $(LOCAL_PATH)/Android.build.mk
+
 # -----------------------------------------------------------------------------
 # Fortify tests.
 # -----------------------------------------------------------------------------