Fix to detect XRandR on multi-prefix package platforms

Change to find two XrandR header files from invidual directory.
"Xrandr.h" is in `libXrandr`, and "randr.h" is in `xorgproto` (used to be
`randrproto`) package, so they may be installed into different prefix.

Signed-off-by: OBATA Akio <obache@wizdas.com>
(cherry picked from commit bade711c82)

config.tests/x11/xrandr.test

@@ -43,28 +43,28 @@ if [ -z "$F" ]; then
 fi
     
 # check for Xrandr.h and randr.h
-XRANDR_H=
 RANDR_H=
 if [ "$XRANDR" = "yes" ]; then
-    INC="X11/extensions/Xrandr.h"
-    INC2="X11/extensions/randr.h"
+    INCS="X11/extensions/Xrandr.h X11/extensions/randr.h"
     XDIRS=`sed -n -e '/^QMAKE_INCDIR_X11[	]*=/ { s/[^=]*=[	 ]*//; s/-I/ /g; p; }' $XCONFIG`
     INCDIRS="$IN_INCDIRS $XDIRS /usr/include /include"
-    F=
-    for INCDIR in $INCDIRS; do
-	if [ -f $INCDIR/$INC -a -f $INCDIR/$INC2 ]; then
-	    F=yes
-	    XRANDR_H=$INCDIR/$INC
-	    RANDR_H=$INCDIR/$INC2
-	    [ "$VERBOSE" = "yes" ] && echo "  Found $INC in $INCDIR"
-	    break
+    for INC in $INCS; do
+	F=
+	for INCDIR in $INCDIRS; do
+	    if [ -f $INCDIR/$INC ]; then
+		F=yes
+		[ "$INC" = "X11/extensions/randr.h" ] && RANDR_H=$INCDIR/$INC
+		[ "$VERBOSE" = "yes" ] && echo "  Found $INC in $INCDIR"
+		break
+	    fi
+	done
+	if [ -z "$F" ]
+	then
+	    XRANDR=no
+	    [ "$VERBOSE" = "yes" ] && echo "  Could not find $INC anywhere in $INCDIRS"
+	    break;
 	fi
     done
-    if [ -z "$F" ]
-    then
-	XRANDR=no
-	[ "$VERBOSE" = "yes" ] && echo "  Could not find $INC anywhere in $INCDIRS"
-    fi
 fi
 
 # verify that we are using XRandR 1.x >= 1.1