Add PlatformHaiku.cmake for WTF

Reviewed by Adrian Perez de Castro.

Introduce PlatformHaiku.cmake file for building on Haiku platform. For
now only the cpp files shared with other platforms are listed. Later
commits will add more Haiku specific files.

* Source/WTF/wtf/PlatformHaiku.cmake: Added.

Canonical link: https://commits.webkit.org/296033@main

Author: pulkomandy

Source/WTF/wtf/PlatformHaiku.cmake

@@ -0,0 +1,36 @@
+list(APPEND WTF_SOURCES
+    generic/MainThreadGeneric.cpp
+    generic/WorkQueueGeneric.cpp
+
+    posix/CPUTimePOSIX.cpp
+    posix/FileHandlePOSIX.cpp
+    posix/FileSystemPOSIX.cpp
+    posix/MappedFileDataPOSIX.cpp
+    posix/OSAllocatorPOSIX.cpp
+    posix/ThreadingPOSIX.cpp
+
+    text/unix/TextBreakIteratorInternalICUUnix.cpp
+
+    unicode/icu/CollatorICU.cpp
+
+    unix/LoggingUnix.cpp
+    unix/MemoryPressureHandlerUnix.cpp
+    unix/UniStdExtrasUnix.cpp
+)
+
+list(APPEND WTF_PUBLIC_HEADERS
+    unix/UnixFileDescriptor.h
+)
+
+list(APPEND WTF_LIBRARIES
+    ${ZLIB_LIBRARIES}
+    be execinfo
+)
+
+list(APPEND WTF_INCLUDE_DIRECTORIES
+    /system/develop/headers/private/system/arch/$ENV{BE_HOST_CPU}/
+    /system/develop/headers/private/system
+)
+
+add_definitions(-D_DEFAULT_SOURCE)
+