community/suitesparse: don't install libs into /usr/lib64

libmongoose is currently installed into /usr/lib64 instead of /usr/lib:

    /usr/lib64/libmongoose.so
    /usr/lib64/libmongoose.so.2
    /usr/lib64/libmongoose.so.2.0.4

Resolves !15718

community/suitesparse/APKBUILD

@@ -3,7 +3,7 @@
 pkgname=suitesparse
 _pkgname=SuiteSparse
 pkgver=5.6.0
-pkgrel=1
+pkgrel=2
 pkgdesc="A collection of sparse matrix libraries"
 url="http://faculty.cse.tamu.edu/davis/suitesparse.html"
 arch="all !mips !mips64"
@@ -28,7 +28,8 @@ prepare() {
 
 build() {
 	#BLAS=-lblas
-	make library
+	make library \
+		CMAKE_OPTIONS="-DCMAKE_INSTALL_LIBDIR=$pkgdir/usr/lib"
 }
 
 package() {