[PATCH] gas: arm: handle multiple .directives on a single line (PR29519)

[Richard Earnshaw]

There's been a long-standing bug in the arm backend where
target-specific directives did not correctly handle lines with
multiple statements.  This patch fixes the issue for all the cases
I've been able to find.

It does result in a slight change in behaviour when errors are
encountered: where, previously,

  .cpu arm6 bar

would result in the error "junk at end of line, first unrecognized
character is `b'", we now get "unknown cpu `arm6 bar'", which I think
is slightly more helpful anyway.  Similar errors are generated for
other directives.
---
 gas/config/tc-arm.c                | 64 ++++++++++++++++++++----------
 gas/testsuite/gas/arm/directives.d | 18 +++++++++
 gas/testsuite/gas/arm/directives.s | 11 +++++
 3 files changed, 73 insertions(+), 20 deletions(-)
 create mode 100644 gas/testsuite/gas/arm/directives.d
 create mode 100644 gas/testsuite/gas/arm/directives.s

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