Make imported pkgconfig targets global

Signed-off-by: Ralph Giles <giles@thaumas.net>
Signed-off-by: evpobr <evpobr@gmail.com>

.travis.yml

@@ -31,7 +31,6 @@ before_script:
     fi
 
 script:
-  - echo ${PATH}
   - cmake -Bbuild -H.
   - cmake --build build
   - ./autogen.sh

cmake/FindOgg.cmake

@@ -2,5 +2,6 @@ find_package(Ogg CONFIG)
 if(NOT TARGET Ogg::ogg)
   find_package(PkgConfig REQUIRED)
   pkg_check_modules(Ogg REQUIRED IMPORTED_TARGET ogg)
+  set_target_properties(PkgConfig::Ogg PROPERTIES IMPORTED_GLOBAL TRUE)
   add_library(Ogg::ogg ALIAS PkgConfig::Ogg)
 endif()

cmake/FindOpus.cmake

@@ -2,5 +2,6 @@ find_package(Opus CONFIG)
 if(NOT TARGET Opus::opus)
   find_package(PkgConfig REQUIRED)
   pkg_check_modules(Opus REQUIRED IMPORTED_TARGET opus)
+  set_target_properties(PkgConfig::Opus PROPERTIES IMPORTED_GLOBAL TRUE)
   add_library(Opus::opus ALIAS PkgConfig::Opus)
 endif()