cmd/internal/obj/riscv: TestPCAlign failures

[gopherbot]

#!watchflakes
default <- pkg == "cmd/internal/obj/riscv" && test == "TestPCAlign"

Issue created automatically to collect these failures.

Example (log):

=== RUN   TestPCAlign
    asm_test.go:300: Failed to assemble: fork/exec /home/swarming/.swarming/w/ir/x/w/goroot/bin/go: resource temporarily unavailable
    asm_test.go:309: PCALIGN test failed - got 
        want 0f 00 f0 0f 13 00 00 00 0f 00 f0 0f 67 80 00 00
--- FAIL: TestPCAlign (0.04s)

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "cmd/internal/obj/riscv" && test == "TestPCAlign"

2024-03-20 19:08 gotip-openbsd-amd64 go@a245aced cmd/internal/obj/riscv.TestPCAlign (log)

=== RUN   TestPCAlign
    asm_test.go:300: Failed to assemble: fork/exec /home/swarming/.swarming/w/ir/x/w/goroot/bin/go: resource temporarily unavailable
    asm_test.go:309: PCALIGN test failed - got 
        want 0f 00 f0 0f 13 00 00 00 0f 00 f0 0f 67 80 00 00
--- FAIL: TestPCAlign (0.04s)

— watchflakes

[cherrymui]

Dup of #66474