libubacktrace: fix backtrace support on arm-eabi, which needs libgcc_eh linked too

Signed-off-by: Henning Heinold <heinold@inf.fu-berlin.de>
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

libubacktrace/Makefile.in

@@ -12,6 +12,10 @@ CFLAGS-libubacktrace := -DNOT_IN_libc -DIS_IN_libubacktrace $(SSP_ALL_CFLAGS)
 
 LDFLAGS-libubacktrace.so := $(LDFLAGS) $(top_builddir)lib/libdl-$(VERSION).so
 
+ifeq ($(CONFIG_ARM_EABI),y)
+LIBGCC += $(shell $(CC) -print-file-name=libgcc_eh.a)
+endif
+
 LIBS-libubacktrace.so := $(LIBS)
 
 libubacktrace_FULL_NAME := libubacktrace-$(VERSION).so