kristall: fix build

With build_style=gnu-makefile trying to build 'kristall' errored with:
error "You must build your code with position independent code if Qt was built with -reduce-relocations. "
      "Compile your code with -fPIC (and not with -fPIE)."
Switch to build_style=qmake to make sure all CXXFLAGS are set as required.

Unfortunately the data installation is no separate target in Makefile thus do it in post_install().

The kristall-mime-info.xml file is missing in the tarball yet installed in the Makefile.
Download it from https://github.com/MasterQ32/kristall/blob/master/kristall-mime-info.xml

srcpkgs/kristall/template

@@ -2,17 +2,33 @@
 pkgname=kristall
 version=0.3
 revision=1
-build_style=gnu-makefile
-build_helper=qmake
+build_wrksrc=src
+build_style=qmake
 hostmakedepends="qt5-qmake qt5-host-tools qt5-multimedia-devel qt5-svg-devel"
 makedepends="qt5-devel qt5-multimedia-devel qt5-svg-devel"
 short_desc="Small-Internet Browser"
 maintainer="Isaac Freund <ifreund@ifreund.xyz>"
 license="GPL-3.0-or-later"
 homepage="https://kristall.random-projects.net"
-distfiles="https://github.com/MasterQ32/kristall/archive/V${version}.tar.gz"
-checksum=24733402e0e3924459222c87aa2137139ff8ae10410a2a88d56455c5ec172368
+distfiles="https://github.com/MasterQ32/kristall/archive/V${version}.tar.gz
+ https://raw.githubusercontent.com/MasterQ32/kristall/master/kristall-mime-info.xml"
+checksum="24733402e0e3924459222c87aa2137139ff8ae10410a2a88d56455c5ec172368
+ 287f63fb3f1dfa0577fe2efb6f421a3299a928dfe139cb2a05c571aa171c2c9b"
+skip_extraction="kristall-mime-info.xml"
+
+pre_configure() {
+	vsed -i kristall.pro -e 's;/opt/$${TARGET}/;/usr/;'
+	cp -pv ${XBPS_SRCDISTDIR}/${pkgname}-${version}/kristall-mime-info.xml ${wrksrc}
+}
+
+post_install() {
+	local share=usr/share icons=usr/share/icons
+	vinstall icons/kristall.svg 644 ${icons}/hicolor/scalable/apps net.random-projects.kristall.svg
+	vinstall icons/kristall-16.png 644 ${icons}/hicolor/16x16/apps net.random-projects.kristall.png
+	vinstall icons/kristall-32.png 644 ${icons}/hicolor/32x32/apps net.random-projects.kristall.png
+	vinstall icons/kristall-64.png 644 ${icons}/hicolor/64x64/apps net.random-projects.kristall.png
+	vinstall icons/kristall-128.png 644 ${icons}/hicolor/128x128/apps net.random-projects.kristall.png
+	vinstall ${wrksrc}/Kristall.desktop 644 ${share}/applications
+	vinstall ${wrksrc}/kristall-mime-info.xml 644 ${share}/mime/packages kristall.xml
 
-pre_install() {
-	export INSTALL="install -D"
 }