atari800: misc tweaks (close #1215)

- Set comment on first line to follow void-packages style.
- Do not force opengl, let configure enable/disable it.
- Do not strip bins via install(8) -s, let xbps-src do this.

This fixes cross compilation and makes xbps-src generate a working -dbg pkg.

srcpkgs/atari800/template

@@ -1,5 +1,6 @@
-pkgname="atari800"
+# Template file for 'atari800'
-version="3.1.0"
+pkgname=atari800
+version=3.1.0
 revision=1
 build_style=gnu-configure
 short_desc="Emulator of Atari 800/800XL/130XE/5200 with various extensions"
@@ -10,7 +11,7 @@ build_wrksrc="src"
 homepage="http://atari800.sourceforge.net"
 configure_args="
 --disable-sdltest
---with-video=sdl --with-opengl --with-sound=sdl --with-x --with-readline
+--with-video=sdl --with-sound=sdl --with-x --with-readline
 --enable-rserial --enable-rnetwork
 --enable-linuxjoystick --enable-eventrecording
 --enable-voicebox --enable-stereosound
@@ -22,3 +23,8 @@ configure_args="
 --enable-bufferedlog --enable-newcycleexact --enable-unalignedwords"
 distfiles="${SOURCEFORGE_SITE}/atari800/atari800/${version}/atari800-${version}.tar.gz"
 checksum="901b02cce92ddb0b614f8034e6211f24cbfc2f8fb1c6581ba0097b1e68f91e0c"
+
+pre_configure() {
+	# Do not strip bins.
+	sed -i '/@INSTALL_PROGRAM@/s/-s//' Makefile.in
+}