libftdi1: Apply pkgconfig fixes to libftdipp1 as well

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/libftdi1/Makefile

@@ -68,6 +68,8 @@ define Build/InstallDev
 	$(call Build/InstallDev/cmake,$(1))
 	$(SED) 's,/usr/include,$$$${prefix}/include,g' $(1)/usr/lib/pkgconfig/libftdi1.pc
 	$(SED) 's,/usr/lib,$$$${prefix}/lib,g' $(1)/usr/lib/pkgconfig/libftdi1.pc
+	$(SED) 's,/usr/include,$$$${prefix}/include,g' $(1)/usr/lib/pkgconfig/libftdipp1.pc
+	$(SED) 's,/usr/lib,$$$${prefix}/lib,g' $(1)/usr/lib/pkgconfig/libftdipp1.pc
 endef
 
 define Package/libftdi1/install