Update .gitignore

m4/*.m4 -> autoreconf adds stuff there
tests   -> Build product

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/.gitignore b/.gitignore
index d61cdc5..06904fa 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@
 *.la
 *.pc
 aclocal.m4
+m4/*.m4
 autom4te.cache
 config.h*
 config.sub
@@ -23,3 +24,7 @@
 
 .tarball-version
 .version
+
+tests/sms/sms_test
+tests/timer/timer_test
+