jobspec: Use "yaml-cpp" instead of "Yaml-cpp"

[dongahn]

Fix a flux-sched autoconf problem when it uses
PKG_CHECK_MODULES to gather libraray info on jobspec
package.

Apparently pkg-config doesn't like the dependent
package name: "Yaml-cpp."

On quartz:
$ uname -a
Linux quartz1916 3.10.0-693.5.2.1chaos.ch6.x86_64 #1
SMP Wed Oct 25 16:20:31 PDT 2017 x86_64 x86_64 x86_64 GNU/Linux

$ pkg-config --cflags flux-jobspec
Package Yaml-cpp was not found in the pkg-config search path.
Perhaps you should add the directory containing `Yaml-cpp.pc'
to the PKG_CONFIG_PATH environment variable
Package 'Yaml-cpp', required by 'flux-jobspec', not found

Get a simiar configure error when
PKG_CHECK_MODULES([JOBSPEC],[flux-jobspec],[],[]) is used.

[coveralls]

Coverage increased (+0.07%) to 78.616% when pulling c500d7e on dongahn:jobspec-pkg-fix into 53697fa on flux-framework:master.

[codecov-io]

Codecov Report

Merging #1306 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1306      +/-   ##
==========================================
+ Coverage   78.22%   78.28%   +0.06%     
==========================================
  Files         154      154              
  Lines       27935    27935              
==========================================
+ Hits        21851    21868      +17     
+ Misses       6084     6067      -17

Impacted Files	Coverage Δ
src/common/libflux/future.c	88.78% <0%> (-0.47%)	⬇️
src/broker/module.c	84.07% <0%> (+0.27%)	⬆️
src/broker/overlay.c	74.2% <0%> (+0.31%)	⬆️
src/common/libflux/message.c	81.6% <0%> (+0.47%)	⬆️
src/common/libutil/base64.c	95.77% <0%> (+0.7%)	⬆️
src/common/libflux/mrpc.c	86.66% <0%> (+1.17%)	⬆️
src/common/libflux/request.c	89.74% <0%> (+1.28%)	⬆️
src/modules/connector-local/local.c	74.38% <0%> (+1.43%)	⬆️

[garlick]

Interesting. I checked on my ubuntu system, and the pc file names the package with upper case Y:

prefix=/usr
exec_prefix=/usr
includedir=${prefix}/include

Name: Yaml-cpp
Description: A YAML parser and emitter for C++
Version: 0.5.2
Requires:
Libs: -lyaml-cpp
Cflags: -I${includedir}

however, only all lower case seems to work with pkg-config:

$ pkg-config --modversion yaml-cpp
0.5.2
$ pkg-config --modversion Yaml-cpp
Package Yaml-cpp was not found in the pkg-config search path.
Perhaps you should add the directory containing `Yaml-cpp.pc'
to the PKG_CONFIG_PATH environment variable
No package 'Yaml-cpp' found

So looks good to me. Needs a rebase now though (sorry).

[dongahn]

Not a problem. Will do shortly.

[dongahn]

Ok. Rebased and forced a push.

[coveralls]

Coverage increased (+0.06%) to 78.608% when pulling 4db5c60 on dongahn:jobspec-pkg-fix into b43aca0 on flux-framework:master.

[garlick]

Thanks!