depends, libevent: Do not install *.pc files and remove patches for them

depends/patches/libevent/cmake_fixups.patch

@@ -1,8 +1,5 @@
 cmake: set minimum version to 3.5
 
-Fix generated pkg-config files, see
-https://github.com/libevent/libevent/pull/1165.
-
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
 @@ -19,7 +19,7 @@
@@ -14,22 +11,3 @@ https://github.com/libevent/libevent/pull/1165.
  
  if (POLICY CMP0054)
      cmake_policy(SET CMP0054 NEW)
-diff --git a/cmake/AddEventLibrary.cmake b/cmake/AddEventLibrary.cmake
-index 04f5837e..d8ea42c4 100644
---- a/cmake/AddEventLibrary.cmake
-+++ b/cmake/AddEventLibrary.cmake
-@@ -20,12 +20,12 @@ macro(generate_pkgconfig LIB_NAME)
- 
-     set(LIBS         "")
-     foreach (LIB ${LIB_PLATFORM})
--        set(LIBS "${LIBS} -L${LIB}")
-+        set(LIBS "${LIBS} -l${LIB}")
-     endforeach()
- 
-     set(OPENSSL_LIBS "")
-     foreach(LIB ${OPENSSL_LIBRARIES})
--        set(OPENSSL_LIBS "${OPENSSL_LIBS} -L${LIB}")
-+        set(OPENSSL_LIBS "${OPENSSL_LIBS} -l${LIB}")
-     endforeach()
- 
-     configure_file("lib${LIB_NAME}.pc.in" "lib${LIB_NAME}.pc" @ONLY)