ebuild: Add MAKE_PARALLEL_FLAGS to VPP build

Align with other packages.

Type: make

Change-Id: I3c8f5c6a349ce9d4e05f546945ae2d8dcf3b1b61
Signed-off-by: juraj.linkes <juraj.linkes@pantheon.tech>
diff --git a/build-data/packages/vpp.mk b/build-data/packages/vpp.mk
index ec61083..9bf9d07 100644
--- a/build-data/packages/vpp.mk
+++ b/build-data/packages/vpp.mk
@@ -47,7 +47,7 @@
   cd $(PACKAGE_BUILD_DIR) && \
   $(CMAKE) -G Ninja $(vpp_cmake_args) $(call find_source_fn,$(PACKAGE_SOURCE))
 #vpp_make_args = --no-print-directory
-vpp_build = $(CMAKE) --build $(PACKAGE_BUILD_DIR)
+vpp_build = $(CMAKE) --build $(PACKAGE_BUILD_DIR) -- $(MAKE_PARALLEL_FLAGS)
 vpp_install = $(CMAKE) --build $(PACKAGE_BUILD_DIR) -- install | grep -v 'Set runtime path'
 
 vpp-package-deb: vpp-install