Merge bitcoin#597: Add $(COMMON_LIB) to exhaustive tests to fix ARM a…

…sm build

8348386 Add $(COMMON_LIB) to exhaustive tests to fix ARM asm build (Gregory Maxwell)

Pull request description:

Tree-SHA512: ef091b86189a2235710866689024f2b190ebcc5741667be0921e6b4a50d53ddf9a63f4c90b1509f25e46631d75338913143a2a1335a74c842f84b98739a9d306

Makefile.am

@@ -114,7 +114,7 @@ exhaustive_tests_CPPFLAGS = -DSECP256K1_BUILD -I$(top_srcdir)/src $(SECP_INCLUDE
 if !ENABLE_COVERAGE
 exhaustive_tests_CPPFLAGS += -DVERIFY
 endif
-exhaustive_tests_LDADD = $(SECP_LIBS)
+exhaustive_tests_LDADD = $(SECP_LIBS) $(COMMON_LIB)
 exhaustive_tests_LDFLAGS = -static
 TESTS += exhaustive_tests
 endif