Update core/os/os_linux.odin

Co-authored-by: Laytan <[email protected]>

core/os/os_linux.odin

@@ -986,6 +986,7 @@ unset_env :: proc(key: string) -> Error {
 
 @(require_results)
 get_current_directory :: proc(allocator := context.allocator) -> string {
+	context.allocator = allocator
 	// NOTE(tetra): I would use PATH_MAX here, but I was not able to find
 	// an authoritative value for it across all systems.
 	// The largest value I could find was 4096, so might as well use the page size.