gmsh, switch to python3.9, cleanup (#8430)

sci-libs/gmsh/gmsh-4.8.4.recipe

@@ -10,16 +10,16 @@ the C++, C, Python or Julia Application Programming Interface (API)."
 HOMEPAGE="http://gmsh.info/"
 COPYRIGHT="1997-2021 C. Geuzaine and J.-F. Remacle"
 LICENSE="GNU GPL v2"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="http://gmsh.info/src/gmsh-4.8.4-source.tgz"
 CHECKSUM_SHA256="760dbdc072eaa3c82d066c5ba3b06eacdd3304eb2a97373fe4ada9509f0b6ace"
 SOURCE_DIR="gmsh-$portVersion-source"
 
-ARCHITECTURES="all !x86_gcc2 !x86"
-SECONDARY_ARCHITECTURES="!x86_gcc2 x86"
+ARCHITECTURES="all !x86_gcc2"
+SECONDARY_ARCHITECTURES="x86"
 
 libVersion="$portVersion"
-libVersionCompat="$libVersion compat >= ${libVersion%%.*}"
+libVersionCompat="$libVersion compat >= ${libVersion%.*}"
 
 PROVIDES="
 	gmsh$secondaryArchSuffix = $portVersion
@@ -53,7 +53,7 @@ BUILD_PREREQUIRES="
 	cmd:g++$secondaryArchSuffix
 	cmd:make
 	cmd:pkg_config$secondaryArchSuffix
-	cmd:python3.7
+	cmd:python3
 	cmd:sed
 	cmd:strip$secondaryArchSuffix
 	"
@@ -79,7 +79,6 @@ INSTALL()
 	cmake --install build
 
 	prepareInstalledDevelLib libgmsh
-
 	fixPkgconfig
 
 	packageEntries devel \