Move gcc to general

Lot of packages explicitly requires gcc now, but almost all of
the components needs it.

Always keep gcc in hand-range.

files/rpms/general: always installs the libxlst2-devel, not just on
RHEL 6, package recompile capability always handy and these are small
packages anyway.

Change-Id: Ia7d0e1938fb2453e3c02b979f99d6d179c6a24c6
diff --git a/files/apts/general b/files/apts/general
index 020d84f..d81ec7a 100644
--- a/files/apts/general
+++ b/files/apts/general
@@ -5,6 +5,7 @@
 unzip
 wget
 psmisc
+gcc
 git
 lsof # useful when debugging
 openssh-server