dlib, build fix, fix libVersion (#8428)

sci-libs/dlib/dlib-19.21.recipe

@@ -5,7 +5,7 @@ world problems."
 HOMEPAGE="http://dlib.net/"
 COPYRIGHT="2003-2020 Davis E. King"
 LICENSE="Boost v1.0"
-REVISION="1"
+REVISION="2"
 SOURCE_URI="https://downloads.sourceforge.net/dclib/dlib-$portVersion.tar.bz2
 	http://dlib.net/files/dlib-$portVersion.tar.bz2"
 CHECKSUM_SHA256="be728a03ae8c4dc8b48408d90392a3c28bc6642a6eb22f3885895b434d7df53c"
@@ -13,7 +13,7 @@ CHECKSUM_SHA256="be728a03ae8c4dc8b48408d90392a3c28bc6642a6eb22f3885895b434d7df53
 ARCHITECTURES="all !x86_gcc2"
 SECONDARY_ARCHITECTURES="x86"
 
-libVersion="$portVersion"
+libVersion="19.21.0"
 libVersionCompat="$libVersion compat >= ${libVersion%%.*}"
 
 PROVIDES="
@@ -63,7 +63,7 @@ BUILD()
 {
 	mkdir -p build && cd "$_"
 
-	cmake .. \
+	cmake .. -DCMAKE_BUILD_TYPE=Release \
 		-DBUILD_SHARED_LIBS=ON \
 		$cmakeDirArgs