Update INSTALL_CMAKE filename to INSTALL_CMAKE.md
Fixing for
# $Id: Makefile.am,v 1.37 2009/03/26 15:41:15 bagder Exp $
-EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE HACKING TODO \
+EXTRA_DIST = template.3 BINDINGS INSTALL_AUTOTOOLS INSTALL_CMAKE.md HACKING TODO \
AUTHORS CMakeLists.txt HACKING.CRYPTO SECURITY.md
dist_man_MANS = \
