install: add --only-dependencies option

The traditional approach to installing the dependencies of a formula is
the following:

  brew install `brew deps formula`

This approach ignores any options that are specified in the parent
formula. This pull request adds a --only-dependencies option to brew
install that installs the dependencies of a formula with optional flags,
but returns before installing the parent formula.

Closes #25272.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
Note when --only-dependencies is a no-op
brew-test-bot: use install --only-dependencies.
qpdf 5.1.0

Drop patches, adjust pcre link path
android-ndk r9b

Closes #25344.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
percona-server: fix url.

Closes #25351.
wireshark 1.10.5

Closes #25352.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
brew-test-bot: remove form feed properly.
brew-test-bot: delete takes string, not regex.
scala devel 2.11.0-M7

Closes #25346.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
newlisp (devel) 10.5.6

Closes #25347.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
openssl: update URL

Closes #25335.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
diffpdf: Update homepage URL

diffpdf is going commercial, but version 2.1.3---the last
open-source one---is still available.  Its homepage has changed.

Closes #25341.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
curl 7.34.0

Closes #25286.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
ruby-build 20131220

Closes #25360.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
sphinx 2.1.4

Closes #25361.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
dub 0.9.20

Closes #25367.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
gsoap: fix checksum

Closes #25364.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>
libuv 0.10.21
ruby-build 20131220.1

Closes #25369.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>