pw_build: Increase size of test linker script memory region

The bazel linker script test has regions that are too small to fit
the contents of linux binaries. This change increases the size of the
memory region that is undersized so the binary will properly link.

Change-Id: I5800ec38eaa4794fd3cace62c71dd6d21156b2e4
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/164823
Presubmit-Verified: CQ Bot Account <pigweed-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed-service-accounts.iam.gserviceaccount.com>
Pigweed-Auto-Submit: Armando Montanez <amontanez@google.com>
Reviewed-by: Anthony DiGirolamo <tonymd@google.com>

pw_build/bazel_internal/BUILD.bazel

@@ -24,7 +24,7 @@ pw_linker_script(
         "PW_BOOT_RAM_BEGIN=0x20000000",
         "PW_BOOT_RAM_SIZE=192K",
         "PW_BOOT_VECTOR_TABLE_BEGIN=0x08000000",
-        "PW_BOOT_VECTOR_TABLE_SIZE=512",
+        "PW_BOOT_VECTOR_TABLE_SIZE=1M",
     ],
     linker_script = "linker_script.ld",
 )