Merge ".gitignore updates for 11" into 11

.gitignore

@@ -18,6 +18,8 @@
 *.moduleinfo
 *.makeopts
 *.makedeps
+aclocal.m4
+autom4te.cache
 makeopts
 .lastclean
 config.log

channels/h323/.gitignore

+Makefile

res/pjproject/.gitignore

+build.mak
+build/cc-auto.mak
+build/os-auto.mak
+pjlib-util/build/os-auto.mak
+pjlib/build/os-auto.mak
+pjlib/include/pj/compat/m_auto.h
+pjlib/include/pj/compat/os_auto.h
+pjmedia/build/os-auto.mak
+pjmedia/include/pjmedia-codec/config_auto.h
+pjmedia/include/pjmedia/config_auto.h
+pjsip/build/os-auto.mak
+pjsip/include/pjsip/sip_autoconf.h
+third_party/build/os-auto.mak
+third_party/build/portaudio/os-auto.mak