Optimize the depends builds for faster compilation

This includes more fine grained configure options and skipping the
openssl and zlib dependencies when compiling qt. The zlib and libevent
packages are removed.

contrib/depends/packages/qt.mk

@@ -4,7 +4,6 @@ $(package)_download_path=https://download.qt.io/archive/qt/5.7/5.7.1/submodules
 $(package)_suffix=opensource-src-$($(package)_version).tar.gz
 $(package)_file_name=qtbase-$($(package)_suffix)
 $(package)_sha256_hash=95f83e532d23b3ddbde7973f380ecae1bac13230340557276f75f2e37984e410
-$(package)_dependencies=openssl zlib
 $(package)_build_subdir=qtbase
 $(package)_qt_libs=corelib
 $(package)_patches=pidlist_absolute.patch fix_qt_pkgconfig.patch qfixed-coretext.patch
@@ -62,14 +61,14 @@ $(package)_config_opts += -no-xrender
 $(package)_config_opts += -nomake examples
 $(package)_config_opts += -nomake tests
 $(package)_config_opts += -opensource
-$(package)_config_opts += -openssl-linked
+$(package)_config_opts += -no-openssl
 $(package)_config_opts += -optimized-qmake
 $(package)_config_opts += -pch
 $(package)_config_opts += -pkg-config
-$(package)_config_opts += -qt-libpng
-$(package)_config_opts += -qt-libjpeg
+$(package)_config_opts += -no-libpng
+$(package)_config_opts += -no-libjpeg
 $(package)_config_opts += -qt-pcre
-$(package)_config_opts += -system-zlib
+$(package)_config_opts += -no-zlib
 $(package)_config_opts += -reduce-exports
 $(package)_config_opts += -static
 $(package)_config_opts += -silent
@@ -124,7 +123,6 @@ define $(package)_config_cmds
   export PKG_CONFIG_LIBDIR=$(host_prefix)/lib/pkgconfig && \
   export PKG_CONFIG_PATH=$(host_prefix)/share/pkgconfig  && \
   ./configure $($(package)_config_opts) && \
-  echo "host_build: QT_CONFIG ~= s/system-zlib/zlib" >> mkspecs/qconfig.pri && \
   echo "CONFIG += force_bootstrap" >> mkspecs/qconfig.pri && \
   $(MAKE) sub-src-clean && \
   cd ../qttranslations && ../qtbase/bin/qmake qttranslations.pro -o Makefile && \