BUILD: fix "make dist" failure on some linux distro with old csh/tcsh

on some linux distro (sles11sp2) csh fails to parse $LS_COLORS and borks with error:
Unknown colorls variable `mh'.

The workaround is to unset LS_COLORS before calling to csh script

reviewed by Jeff

cmr=v1.8:reviewer=ompi-rm1.8

This commit was SVN r31244.

Makefile.am

@@ -25,6 +25,6 @@ EXTRA_DIST = README INSTALL VERSION Doxyfile LICENSE autogen.pl autogen.sh \
 include examples/Makefile.include
 
 dist-hook:
-	csh "$(top_srcdir)/config/distscript.csh" "$(top_srcdir)" "$(distdir)" "$(OMPI_VERSION)" "$(OMPI_SVN_R)"
+	env LS_COLORS= csh "$(top_srcdir)/config/distscript.csh" "$(top_srcdir)" "$(distdir)" "$(OMPI_VERSION)" "$(OMPI_SVN_R)"
 
 ACLOCAL_AMFLAGS = -I config

opal/mca/hwloc/hwloc172/hwloc/Makefile.am

@@ -62,7 +62,7 @@ if !HWLOC_BUILD_README
 dist-hook: cannot-dist
 else
 dist-hook:
-	csh "$(top_srcdir)/config/distscript.csh" "$(top_srcdir)" "$(distdir)" "$(HWLOC_VERSION)" "$(HWLOC_SVN_R)"
+	env LS_COLORS= csh "$(top_srcdir)/config/distscript.csh" "$(top_srcdir)" "$(distdir)" "$(HWLOC_VERSION)" "$(HWLOC_SVN_R)"
 endif HWLOC_BUILD_README
 endif HWLOC_BUILD_DOXYGEN
 endif HWLOC_BUILD_STANDALONE