brotli: patch to fix man page install directories [ci skip]

Seen on all macOS-hosted builds in CI:
```
[38/38] Linking C static library libbrotlienc.a
+ cmake --install _a64-mac-sys-bld --prefix _a64-mac-sys/usr
-- Install configuration: "Release"
CMake Error at _a64-mac-sys-bld/cmake_install.cmake:89 (file):
  file cannot create directory: /usr/share/man/man3.  Maybe need
  administrative privileges.
```
Ref: https://github.com/curl/curl-for-win/actions/runs/18853487748/job/53795465550#step:3:2073

Ref: https://cmake.org/cmake/help/latest/module/GNUInstallDirs.html

PR submitted upstream:
google/brotli#1367

Brotli regression from:
google/brotli@cff5803
google/brotli#1084

Author: vszakats

brotli.dev.patch

@@ -0,0 +1 @@
+brotli.patch

brotli.patch

@@ -0,0 +1,17 @@
+diff -u -r a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -384,11 +384,11 @@
+ 
+ if (BROTLI_BUILD_TOOLS)
+   install(FILES "docs/brotli.1"
+-    DESTINATION "${CMAKE_INSTALL_FULL_MANDIR}/man1")
++    DESTINATION "${CMAKE_INSTALL_MANDIR}/man1")
+ endif()
+ 
+ install(FILES docs/constants.h.3 docs/decode.h.3 docs/encode.h.3 docs/types.h.3
+-  DESTINATION "${CMAKE_INSTALL_FULL_MANDIR}/man3")
++  DESTINATION "${CMAKE_INSTALL_MANDIR}/man3")
+ 
+ if (ENABLE_COVERAGE STREQUAL "yes")
+   setup_target_for_coverage(coverage test coverage)

brotli.test.patch

@@ -0,0 +1 @@
+brotli.patch