package/boost: don't install boost cmake files

Since version 1.70.0, boost installs its own cmake files which are
utterly broken so don't install them otherwise all cmake packages using
boost (host-thrift, domoticz, i2pd ...) will fail because
BOOST_INCLUDE_DIRS will be empty

Fixes:
 - http://autobuild.buildroot.org/results/4ada26bab5c1e6504c7d8c92672326ced1d336df

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/boost/boost.mk

@@ -76,8 +76,8 @@ BOOST_DEPENDENCIES += python
 endif
 endif
 
-HOST_BOOST_OPTS += toolset=gcc threading=multi variant=release link=shared \
-	runtime-link=shared
+HOST_BOOST_OPTS += --no-cmake-config toolset=gcc threading=multi \
+	variant=release link=shared runtime-link=shared
 
 ifeq ($(BR2_MIPS_OABI32),y)
 BOOST_ABI = o32
@@ -87,7 +87,8 @@ else
 BOOST_ABI = sysv
 endif
 
-BOOST_OPTS += toolset=gcc \
+BOOST_OPTS += --no-cmake-config \
+	     toolset=gcc \
 	     threading=multi \
 	     abi=$(BOOST_ABI) \
 	     variant=$(if $(BR2_ENABLE_DEBUG),debug,release)