php70: init at 7.0beta1

The first beta of php7 has been released. This enables developers to
test their code for breakage in preparation for the stable release and
allows us to make sure we don't have any bugs in the packaging prior to
the stable release.

pkgs/development/interpreters/php/fix-paths-php7.patch

@@ -0,0 +1,23 @@
+--- php-7.0.0beta1/configure	    2015-07-10 12:11:41.810045613 +0000
++++ php-7.0.0beta1-new/configure	2015-07-17 16:10:21.775528267 +0000
+@@ -6172,7 +6172,7 @@
+     as_fn_error $? "Please note that Apache version >= 2.0.44 is required" "$LINENO" 5
+   fi
+ 
+-  APXS_LIBEXECDIR='$(INSTALL_ROOT)'`$APXS -q LIBEXECDIR`
++  APXS_LIBEXECDIR="$prefix/modules"
+   if test -z `$APXS -q SYSCONFDIR`; then
+     INSTALL_IT="\$(mkinstalldirs) '$APXS_LIBEXECDIR' && \
+                  $APXS -S LIBEXECDIR='$APXS_LIBEXECDIR' \
+@@ -37303,9 +37303,7 @@
+ 
+ 
+ if test "$PHP_GETTEXT" != "no"; then
+-  for i in $PHP_GETTEXT /usr/local /usr; do
+-    test -r $i/include/libintl.h && GETTEXT_DIR=$i && break
+-  done
++  GETTEXT_DIR=$PHP_GETTEXT
+ 
+   if test -z "$GETTEXT_DIR"; then
+     as_fn_error $? "Cannot locate header file libintl.h" "$LINENO" 5
+