Revert "ci: strip bundled pkgcraft-c library for releases"

The bundled pkgcraft-c Cargo.toml doesn't support the release-strip
profile yet, only the pkgcraft workspace does.

This reverts commit bbe8d73.

Author: radhermit

.ci/buildlib

@@ -63,7 +63,7 @@ fi
 if [[ ${PKGCRAFT_C_REF} =~ ^pkgcraft-c-* ]]; then
 	# build and install C library from release tarball
 	curl -L https://github.com/pkgcraft/pkgcraft/releases/download/${PKGCRAFT_C_REF}/${PKGCRAFT_C_REF}.tar.xz | tar -Jxf -
-	cd ${PKGCRAFT_C_REF} && doecho cargo cinstall --profile release-strip
+	cd ${PKGCRAFT_C_REF} && doecho cargo cinstall
 else
 	# build and install C library from git
 	doecho git clone -b ${PKGCRAFT_C_REF} --recurse-submodules https://github.com/pkgcraft/pkgcraft.git