rgbds: Make build respect LDFLAGS

Adds DT_RUNPATH (see #3490).

packages/rgbds/Makefile.patch

@@ -1,7 +1,7 @@
-diff -u -r ../rgbds-0.3.2/Makefile ./Makefile
---- ../rgbds-0.3.2/Makefile	2017-06-10 00:05:16.000000000 +0200
-+++ ./Makefile	2017-08-20 11:44:58.798625382 +0200
-@@ -3,7 +3,7 @@
+diff -u -r ../rgbds-0.3.8/Makefile ./Makefile
+--- ../rgbds-0.3.8/Makefile	2018-12-10 23:19:36.000000000 +0000
++++ ./Makefile	2019-03-10 21:52:48.763105448 +0000
+@@ -11,7 +11,7 @@
  Q		:= @
  PREFIX		:= /usr/local
  bindir		:= ${PREFIX}/bin
@@ -10,3 +10,11 @@ diff -u -r ../rgbds-0.3.2/Makefile ./Makefile
  STRIP		:= -s
  BINMODE		:= 555
  MANMODE		:= 444
+@@ -29,7 +29,6 @@
+ WARNFLAGS	:= -Wall
+ 
+ # Overridable CFLAGS
+-CFLAGS		:= -g
+ # Non-overridable CFLAGS
+ REALCFLAGS	:= ${CFLAGS} ${WARNFLAGS} -std=c99 -D_POSIX_C_SOURCE=200809L \
+ 		   -Iinclude -DBUILD_VERSION_STRING=\"${VERSION_STRING}\"

packages/rgbds/build.sh

@@ -2,8 +2,13 @@ TERMUX_PKG_HOMEPAGE=https://rednex.github.io/rgbds/
 TERMUX_PKG_DESCRIPTION="Rednex Game Boy Development System"
 TERMUX_PKG_LICENSE="MIT"
 TERMUX_PKG_VERSION=0.3.8
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SHA256=ec47b7d7a1b03534ab14b261d13511a18c8b1c3ebddea414e7034496f3423c05
 TERMUX_PKG_SRCURL=https://github.com/rednex/rgbds/releases/download/v${TERMUX_PKG_VERSION}/rgbds-${TERMUX_PKG_VERSION}.tar.gz
 TERMUX_PKG_DEPENDS="libpng"
 TERMUX_PKG_BUILD_IN_SRC=true
 TERMUX_PKG_EXTRA_MAKE_ARGS="PREFIX=${TERMUX_PREFIX} Q= STRIP="
+
+termux_step_pre_configure() {
+	CFLAGS+=" $LDFLAGS"
+}