limit installation of ANGLE translator and preprocessor helper libraries

libGLES2 (the only user of these libraries) is built dynamically even in
a static qt built when dynamicgl is configured. in this case the static
libraries need not be installed.

amends 2311997.

Change-Id: Ic9bc3937d6ee0d97e0ca7fc96596fa90ebfe8710
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>

mkspecs/features/qt_helper_lib.prf

@@ -27,6 +27,6 @@ DLLDESTDIR = $$MODULE_BASE_OUTDIR/bin
 
 # In static builds of Qt, convenience libraries must be installed,
 # as in this case they are not linked to the final library/plugin.
-installed|contains(QT_CONFIG, static): load(qt_installs)
+installed|if(!not_installed:contains(QT_CONFIG, static)): load(qt_installs)
 
 TARGET = $$qt5LibraryTarget($$TARGET)

src/angle/src/compiler/preprocessor/preprocessor.pro

@@ -1,4 +1,5 @@
 CONFIG += static
+contains(QT_CONFIG, dynamicgl): CONFIG += not_installed
 include(../../config.pri)
 
 INCLUDEPATH = $$ANGLE_DIR/src/compiler/preprocessor

src/angle/src/compiler/translator.pro

@@ -1,4 +1,5 @@
 CONFIG += static
+contains(QT_CONFIG, dynamicgl): CONFIG += not_installed
 include(../config.pri)
 
 INCLUDEPATH += \