RFR: 8294438: Fix misleading-indentation warnings in hotspot

[Aleksey Shipilev]

There are number of places where misleading-indentation is reported by GCC. Currently, the warning is disabled for the entirety of Hotspot, which is not good.

C1 does an unusual style here. Changing it globally would touch a lot of lines. Instead of doing that, I fit the existing style while also resolving the warnings. Note this actually solves a bug in `lir_alloc_array`, where `do_temp` are called without a check.

Build-tested this with product of:
  - GCC 10
  - {i686, x86_64, aarch64, powerpc64le, s390x, armhf, riscv64}
  - {server, zero}
  - {release, fastdebug}

Linux x86_64 fastdebug `tier1` is fine.

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Commit messages:
 - Also javaClasses.cpp
 - Fix

Changes: https://git.openjdk.org/jdk/pull/10444/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10444&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8294438
  Stats: 44 lines in 5 files changed: 7 ins; 6 del; 31 mod
  Patch: https://git.openjdk.org/jdk/pull/10444.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10444/head:pull/10444

PR: https://git.openjdk.org/jdk/pull/10444