stubdom: Add autoconf

Stub domains now use autoconf to build.
This configure script can enable or disable specific domains
and also specify custom download locations for stubdom library
packages. See ./configure --help for details.

C and Caml are disabled by default. vtpm-stubdom is conditional
on the presense of cmake.

Rename vtpmmgrdom to vtpmmgr-stubdom

Also update .*ignore

Signed-off-by: Matthew Fioravante <matthew.fioravante@jhuapl.edu>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>

m4/set_cflags_ldflags.m4

@@ -0,0 +1,20 @@
+AC_DEFUN([AX_SET_FLAGS],
+[for cppflag in $PREPEND_INCLUDES
+do
+    PREPEND_CPPFLAGS="$PREPEND_CPPFLAGS -I$cppflag"
+done
+for ldflag in $PREPEND_LIB
+do
+    PREPEND_LDFLAGS="$PREPEND_LDFLAGS -L$ldflag"
+done
+for cppflag in $APPEND_INCLUDES
+do
+    APPEND_CPPFLAGS="$APPEND_CPPFLAGS -I$cppflag"
+done
+for ldflag in $APPEND_LIB
+do
+    APPEND_LDFLAGS="$APPEND_LDFLAGS -L$ldflag"
+done
+CPPFLAGS="$PREPEND_CPPFLAGS $CPPFLAGS $APPEND_CPPFLAGS"
+LDFLAGS="$PREPEND_LDFLAGS $LDFLAGS $APPEND_LDFLAGS"])
+