package/kodi-*: run pkg-config at build time, not at parse time

When calling 'printvars' on a just-configured tree, the output contains
many spurious warnings about pkg-config being not found:

    make[1]: [...]/host/bin/pkg-config: Command not found

This is partly because a few packages call pkg-config at the time the
Makefile is parsed (really, right when make evaluates the recipe before
executing it).

It is customary, instead, to defer the call to pkg-config to the actual
shell running the recipe's commands, like all our other packages do.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit 22fb4c469bcb5b61beadfc78c27e403656eae979)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/kodi-screensaver-asterwave/kodi-screensaver-asterwave.mk

@@ -11,7 +11,7 @@ KODI_SCREENSAVER_ASTERWAVE_LICENSE_FILES = LICENSE.md
 KODI_SCREENSAVER_ASTERWAVE_DEPENDENCIES = glm kodi
 
 KODI_SCREENSAVER_ASTERWAVE_CONF_OPTS += \
-	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)" \
-	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)"
+	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`" \
+	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`"
 
 $(eval $(cmake-package))

package/kodi-screensaver-cpblobs/kodi-screensaver-cpblobs.mk

@@ -11,7 +11,7 @@ KODI_SCREENSAVER_CPBLOBS_LICENSE_FILES = LICENSE.md
 KODI_SCREENSAVER_CPBLOBS_DEPENDENCIES = glm kodi
 
 KODI_SCREENSAVER_CPBLOBS_CONF_OPTS += \
-	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)" \
-	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)"
+	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`" \
+	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`"
 
 $(eval $(cmake-package))

package/kodi-screensaver-matrixtrails/kodi-screensaver-matrixtrails.mk

@@ -11,7 +11,7 @@ KODI_SCREENSAVER_MATRIXTRAILS_LICENSE_FILES = LICENSE.md
 KODI_SCREENSAVER_MATRIXTRAILS_DEPENDENCIES = kodi
 
 KODI_SCREENSAVER_MATRIXTRAILS_CONF_OPTS += \
-	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)" \
-	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) $(shell $(PKG_CONFIG_HOST_BINARY) --cflags egl)"
+	-DCMAKE_C_FLAGS="$(TARGET_CFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`" \
+	-DCMAKE_CXX_FLAGS="$(TARGET_CXXFLAGS) `$(PKG_CONFIG_HOST_BINARY) --cflags egl`"
 
 $(eval $(cmake-package))