Apply Boost CMake fix to all OSs

Signed-off-by: David Shah <dave@ds0.me>

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index e0e578d..fc38c13 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,9 +12,7 @@
 option(EXTERNAL_CHIPDB "Create build with pre-built chipdb binaries" OFF)
 option(SERIALIZE_CHIPDB "Never build chipdb in parallel to reduce peak memory use" ON)
 
-if(${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
-    set(Boost_NO_BOOST_CMAKE ON)
-endif()
+set(Boost_NO_BOOST_CMAKE ON)
 
 set(link_param "")
 if (STATIC_BUILD)