Upgrade obstack to releases/gcc-14.2.0 am: 1b7051167d

Original change: https://android-review.googlesource.com/c/platform/external/obstack/+/3445808

Change-Id: I04d8489610dc000848902f38aef77b3168e87a07
Signed-off-by: Automerger Merge Worker <[email protected]>