buildsystem.rst invalid links

[bill]

buildsystem.rst references a number of bad links:

/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:94: WARNING: undefined label: build/htmltoprofile (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:100: WARNING: undefined label: build/relocatingpackages (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:103: WARNING: undefined label: build/legacybackcompat (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:925: WARNING: undefined label: build/transforms/dojoreport (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:931: WARNING: undefined label: build/transforms/hasreport (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:933: WARNING: undefined label: build/transforms/insertsymbols (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:935: WARNING: undefined label: build/transforms/optimizecss (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:937: WARNING: undefined label: build/transforms/read (if the link has no caption the label must precede a section header)
/Volumes/Data/workspace/rstwiki/export/source/build/buildSystem.rst:943: WARNING: undefined label: build/transforms/writecss (if the link has no caption the label must precede a section header)

[bill]

Duplicate of #14298.