Drop backtracing feature, as it is implemented using using glibc specific
features.

--- a/TheForceEngine/TFE_System/CrashHandler/crashHandlerLinux.cpp
+++ b/TheForceEngine/TFE_System/CrashHandler/crashHandlerLinux.cpp
@@ -1,6 +1,5 @@
 #include <cstring>
 #include <errno.h>
-#include <execinfo.h>
 #include <fcntl.h>
 #include <inttypes.h>
 #include <unistd.h>
@@ -68,18 +67,7 @@
 		TFE_System::logWrite(LOG_ERROR, "CrashHandler", "faulting address %p", siginfo->si_addr);
 	}
 
-	// backtrace() can also segfault; purposefully ignore SEGV before calling it.
-	signal(SIGSEGV, SIG_IGN);
-	entries = backtrace(buf, 512);
-	if (entries) {
-		ents = backtrace_symbols(buf, entries);
-		TFE_System::logWrite(LOG_ERROR, "CrashHandler", "Backtrace %d:", entries);
-		for (i = 0; i < entries; i++) {
-			TFE_System::logWrite(LOG_ERROR, "CrashHandler", "%03d %s", i, ents[i]);
-		}
-	} else {
-		TFE_System::logWrite(LOG_ERROR, "CrashHandler", "no backtrace possible");
-	}
+	TFE_System::logWrite(LOG_ERROR, "CrashHandler", "no backtrace possible");
 
 	// for certain signals, the default handler will create
 	// a coredump if enabled by administrator.