Moved the basic syscall stuff out of m_libcbase.c into a new module
m_syscall.c.  Plus some associated cleanups.

Moved VG_(sigreturn) into m_signals.c and made it local.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3922 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/Makefile.am b/coregrind/Makefile.am
index 213de77..c9d6524 100644
--- a/coregrind/Makefile.am
+++ b/coregrind/Makefile.am
@@ -114,6 +114,7 @@
 	m_signals.c \
 	m_skiplist.c \
 	m_stacktrace.c \
+	m_syscall.c \
 	m_threadmodel.c \
 	m_tooliface.c \
 	m_translate.c \