Replace core:* to base:* where appropriate

core/mem/alloc.odin

@@ -1,6 +1,6 @@
 package mem
 
-import "core:runtime"
+import "base:runtime"
 
 // NOTE(bill, 2019-12-31): These are defined in `package runtime` as they are used in the `context`. This is to prevent an import definition cycle.
 Allocator_Mode :: runtime.Allocator_Mode

core/mem/allocators.odin

@@ -1,7 +1,7 @@
 package mem
 
-import "core:intrinsics"
-import "core:runtime"
+import "base:intrinsics"
+import "base:runtime"
 import "core:sync"
 
 nil_allocator_proc :: proc(allocator_data: rawptr, mode: Allocator_Mode,

core/mem/mem.odin

@@ -1,7 +1,7 @@
 package mem
 
-import "core:runtime"
-import "core:intrinsics"
+import "base:runtime"
+import "base:intrinsics"
 
 Byte     :: runtime.Byte
 Kilobyte :: runtime.Kilobyte

core/mem/raw.odin

@@ -1,7 +1,7 @@
 package mem
 
-import "core:builtin"
-import "core:runtime"
+import "base:builtin"
+import "base:runtime"
 
 Raw_Any           :: runtime.Raw_Any
 Raw_String        :: runtime.Raw_String

core/mem/virtual/virtual.odin

@@ -1,8 +1,8 @@
 package mem_virtual
 
 import "core:mem"
-import "core:intrinsics"
-import "core:runtime"
+import "base:intrinsics"
+import "base:runtime"
 _ :: runtime
 
 DEFAULT_PAGE_SIZE := uint(4096)