cmake: compile git hash into separate object

Should improve incremental compile speeds

app/crashhandler/CMakeLists.txt

@@ -19,6 +19,7 @@ add_executable(
   olive-crashhandler
   crashhandler.cpp
   crashhandler.h
+  $<TARGET_OBJECTS:olive-version-obj>
 )
 
 # Disable console appearing on crash handler dialog

app/crashhandler/crashhandler.cpp

@@ -38,6 +38,7 @@
 
 #include "common/crashpadutils.h"
 #include "common/filefunctions.h"
+#include "version.h"
 
 namespace olive {
 
@@ -227,7 +228,7 @@ void CrashHandlerDialog::SendErrorReport()
   QHttpPart commit_part;
   commit_part.setHeader(QNetworkRequest::ContentTypeHeader, QStringLiteral("text/plain; charset=UTF-8"));
   commit_part.setHeader(QNetworkRequest::ContentDispositionHeader, QStringLiteral("form-data; name=\"commit\""));
-  commit_part.setBody(GITHASH);
+  commit_part.setBody(kGitHash);
   multipart->append(commit_part);
 
   // Create dump section