openssh: Remove use of -ftrapv when using clang

lang with '-ftrapv' generates 'call __mulodi4', which is only implemented
in compiler-rt library. However compiler-rt library only has i386/x86_64
backends (see '/usr/lib/clang/3.7.0/lib/linux/libclang_rt.*'). Gcc, on the
other hand, generate 'call __mulvdi3', which is implemented in libgcc

Signed-off-by: Khem Raj <raj.khem@gmail.com>

recipes-connectivity/openssh/openssh_%.bbappend

@@ -0,0 +1,3 @@
+do_configure_prepend() {
+	sed -i -e '/-ftrapv/d' ${S}/configure.ac
+}